Battery pack



FIG. 1 is a front elevational view of a battery pack;

FIG. 2 is a rear elevational view of the battery pack;

FIG. 3 is a right side elevational view of the battery pack;

FIG. 4 is a left side elevational view of the battery pack;

FIG. 5 is a top plan view of the battery pack;

FIG. 6 is a bottom plan view of the battery pack; and,

FIG. 7 is a left perspective view of the battery pack. 

I claim the ornamental design for a battery pack, as shown. 